8000_MMI.RAP is the actual OS (which is eCOS variant) in the SOFT.IMG. It is located inside "/image" folder insde SOFT.IMG. Issues like unworking firmware (blank screen when booted), shifted screen, feature such as camera or shoulder button not functioning, can be solved just by replacing this file with other 8000_MMI.RAP file. There is actual case where is method is working[6] .